You could sacrifice a creature an opponent owns if you gain control over it, but this is also a relatively rare occurrence
Paying just one mana to instantly remove a creature from play is nice
If players want to quickly increase up how many damage counters they can place on Incineroar GX, while also gaining an equal amount of darkness-type energy cards, trainers can use Incineroar's Scar Charge ability to pile on both
They probably would have at least considered banning something in Standard had the format not been about to rotate, but Guilds of Ravnica should shake things up soon enough
The five-headed dragon slotted right into a number of builds within the Commander format
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